Soaring MERS Cases in Saudi Arabia Raise Alarms

Kai is a contributing correspondent for Science magazine based in Berlin, Germany.

A spike in the reported number of cases of Middle East respiratory syndrome has sparked fresh fears that the virus may have undergone genetic changes that could help it spread between humans and create a pandemic. But preliminary studies have not shown such changes so far, and several other factors could explain the recent explosion, scientists say—from increased testing to sloppy hospital hygiene and a wave of camel births across the region. 

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